RT Journal Article SR Electronic T1 Annual Review of Public Health. Vol. 4 JF Postgraduate Medical Journal JO Postgrad Med J FD The Fellowship of Postgraduate Medicine SP 501 OP 501 DO 10.1136/pgmj.60.705.501 VO 60 IS 705 A1 Waldron, H. A. YR 1984 UL http://pmj.bmj.com/content/60/705/501.1.abstract AB